Anomalous specific-heat jump in the heavy-fermion superconductor CeCoIn5 -: art. no. 212504

被引：8

作者：

Bang, Y ^{[1
]}

Balatsky, AV

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.69.212504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied the anomalously large specific-heat jump and its systematic change with pressure in the CeCoIn5 superconductor. Starting with a general free-energy functional of a coupled electron-boson system, we derived an analytic result of the specific-heat jump of the strong-coupling superconductor occurring in the coupled electron-boson system. Then using the spin-fermion model, we calculated the specific-heat coefficient C(T)/T both for the normal and superconducting states and showed a good agreement with the experiments on CeCoIn5. Our result also demonstrated that the specific-heat coefficient C(T)/T of a coupled electron-boson system can be freely interpreted as a renormalization either of the electronic or of the bosonic degrees of freedom.

引用

页码：212504 / 1

页数：4

共 19 条

[1] Coherent vs. incoherent pairing in 2D systems near magnetic instability [J].

Abanov, A ;

Chubukov, AV ;

Finkel'stein, AM .

EUROPHYSICS LETTERS, 2001, 54 (04) :488-494

[2] Critical magnetic-fluctuations-induced superconductivity and residual density of states in the CeRhIn5 superconductor -: art. no. 224501 [J].

Bang, Y ;

Martin, I ;

Balatsky, AV .

PHYSICAL REVIEW B, 2002, 66 (22) :1-5

[3] FREE-ENERGY DIFFERENCE BETWEEN NORMAL + SUPERCONDUCTING STATES [J].

BARDEEN, J ;

STEPHEN, M .

PHYSICAL REVIEW A-GENERAL PHYSICS, 1964, 136 (6A) :1485-&

[4] Avoided antiferromagnetic order and quantum critical point in CeCoIn5 -: art. no. 257001 [J].

Bianchi, A ;

Movshovich, R ;

Vekhter, I ;

Pagliuso, PG ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2003, 91 (25)

[5] First-order superconducting phase transition in CeCoIn5 -: art. no. 137002 [J].

Bianchi, A ;

Movshovich, R ;

Oeschler, N ;

Gegenwart, P ;

Steglich, F ;

Thompson, JD ;

Pagliuso, PG ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2002, 89 (13) :137002-137002

[6] DIFFERENCE BETWEEN NORMAL AND SUPERCONDUCTING STATES OF A METAL [J].

CHESTER, GV .

PHYSICAL REVIEW, 1956, 103 (06) :1693-1699

[7]

ELIASHBERG GM, 1963, ZH EKSP TEOR FIZ, V16, P780

[8] EFFECT OF SPIN FLUCTUATIONS ON ITINERANT ELECTRON ANTIFERROMAGNETISM [J].

HASEGAWA, H ;

MORIYA, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1974, 36 (06) :1542-1553

[9] Condensation energy in strongly coupled superconductors [J].

Haslinger, R ;

Chubukov, AV .

PHYSICAL REVIEW B, 2003, 67 (14)

[10] Pressure-induced superconductivity in quasi-2D CeRhIn5 [J].

Hegger, H ;

Petrovic, C ;

Moshopoulou, EG ;

Hundley, MF ;

Sarrao, JL ;

Fisk, Z ;

Thompson, JD .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4986-4989

← 1 2 →